how to setup the path of error document on subdomain

i am having problem in displaying my page for 404 error the blog is

original domain ht开发者_如何学编程tp://www.original.com

subdomain http://subdom.original.com

i have uploaded all the data inside the public_html/subdom folder the web site is functioning fine.

below is the entry in my .htaccess file

ErrorDocument 404 /public_html/subdom/errors/notfound.html

the directory errors and the file inside does exist there so there is problem with setting up the path to it.

can some one help me figure out the path where to start ? thanks

I think you just giving the wrong path. The path for ErrorDocument should be relative to your website root. If this url/file http://subdom.original.com/index.php is located at public_html/subdom/index.php then you need to change your directive to the one below:

ErrorDocument 404 /errors/notfound.html

If still nothing -- try adding /subdom in front:

ErrorDocument 404 /subdom/errors/notfound.html